数字曲线切点检测技术

Digital Curve Tangency Point Detection Technology

针对数字曲线的切点识别问题,提出一种基于转角累加的数字曲线切点检测技术。该技术对数字曲线进行光顺处理,构造转角累加线、转角累加线曲率线和曲率波,通过对相邻的分段逼近直线求交确定切点位置。实验结果表明,该方法切点识别准确、迅速,对于由直线、圆弧组成的轮廓边界能实现准确分段。

Aiming at the problem of tangency point reorganization of digital curve,this paper proposes a digital curve tangency point detection technology based on rotate-angle accumulation.The technology uses smooth processing for digital curve,constructs rotate-angle accumulation curve,curvature curve of rotate-angle accumulation curve and curvature wave,and determines the tangency points according to the intersection of every two adjacent fitted line.Experimental results show that tangency point reorganization of this method is correctly and quickly,it can realize subsection correctly for figure boundary composed by straight line and circular arc.